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Finding the Fourth Proportional to 420,735.40, 630,908.70 and 183,956.20

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Solution

The fourth proportional to 420,735.40, 630,908.70 and 183,956.20 is: 275,849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,735.40 : 630,908.70 = 183,956.20 : x
  2. Step 2: Convert to fraction form
    420,735.40/630,908.70 = 183,956.20/x
  3. Step 3: Cross multiply
    420,735.40x = 630,908.70 × 183,956.20
  4. Step 4: Simplify right side
    420,735.40x = 116,059,566,998.94
  5. Step 5: Solve for x
    x = 116,059,566,998.94/420,735.40
  6. Step 6: Final answer
    x = 275,849.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.